Douglas Fir

Pseudotsuga menziesii

The Douglas-fir is an evergreen conifer native to the west coast and Rocky Mountains of North America. There are two main varieties that differ in key characteristics such as height, growth rate, and habitat. The coastal variety (menziesii) can be found along the coast of British Columbia, Washington, Oregon, and northern California; while the interior variety (gauca) follows the contour of the Rocky Mountains from BC down to Colorado, and can be found as far south as the Mexican border…

Characteristics

The Douglas-fir is a large and rapid growing species, with an average height of 60-75 metres and a base diameter of 1.5-2 metres; however, samples of up to 120 metres tall and 6 metres in diameter at the base have been recorded. It should be noted that the coastal variety grows larger and faster than the interior variety. It is speculated that the maximum height a Douglas-fir can grow to is approximately 140-145 metres before water will no longer be able to make itself to the high tops of the canopy…

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